Reinforcement-bar.



W. G. HUGHES. REINFORGEMNT BAR. AIPLIGATIoNyILnD sEPT.12,19o5.

Patented Dee. 21,1909.

WiLLiA-M-G.' HUGHES, or PITTSBURG, PENNSYLVANIA.

REINFoncEMENT-BAR,

Specicatio of Lettersliatent. Iilatentgd Dec, 21., 1909,

Application med september 12, lees. semi ne. 278,128.

To 'all whom 'it may concern.'v Q

vBe it know-n thatl, Hitman G. Hennes, citizen of the United States of America., re

siding at Pittsburg, inthe county ot' Allei ghenv andbtatt` of Pennsylvania, have 1n vented .certain newan'd useful 1in provenients in Reinforcenient-Bars, of which the following is a specification, reference being had a therein' to the vaccoin )anvinr drawing.

. L f7 n `u 'etul improvements in tension bars t'or tireA This invention relates to certain new and prout' construction.

The particular class ot' tire proof construction towhich my invention is applicable is what is known-in the artl as concrete and nietalfo'r reinforcing. applied to that particular class ot' inventions.

My improvement contemplates as aprin'iaiyobject a construction. which more et fectually equalizes in the shearing Istress ot' the -suspended re-intorccimriits.

In its use it is i i l l l l i i i I, ain aware. that heretofore there havev Abeen variouI constructions designedto t'ult'il the purpose ot the above. hut these construct'ioiisvhave been expensive to nuinutactui'e.

itselt'a contour that will ivitiistandaiul equalize all strain.

The detail cou tijuction will appear in the course of the following description. in which i'ei'ei'enct` is had to the :u-coiupaiii'ing di'awing. wherein like numerals ot' ret'ei'ence designate chrrcslainding parts throughout'- the several views. in which :H 4

Iigure l is a plan view 'looking upon leither side ot' mv improved tension hai'` Fig.

2 ie' a side elevation thereof, Fig. El is a tran verse section, Fig'. l is a perspective vien thereof.

The tension har contemplated in the present invention embodies a longitudinal bar 1 which is t'oi'niedof anjv inaterial'well known in the art, both metal and reinforceinent cement being employed to advantage;

The har l is formed on each 'side with depressions which are connected by a central web ot' uiritorin thickness throughout the length ot the bar, These depressions, as shown. are designated b v the numeral 3 and are 'otl substantially V-shape in cross and are toi' the moet part fragile and inet'- tionsl as is shown in Fig. 2, the side 5 ot the.

har following tortuous lines. Hence the de# pressions 3 on the'same side of the bar l but on the opposite surface thereof, are disposed ina staggered relation to one another. The

arrangement of the depressions on the Samev surface of the bar,.butI on lopposite sides thereof. is also similar trom a relative stand' point. the relation being staggered, the points l of the one depression pointing between the apex t3 of the two opposite depressions on the other side and so throughout the entire length of thc bar.

Reference being had to Fig. which is a section taken through the apex ofoue of the depressions it will be observed that along the line of the apex and following the inclination ot' the'depressioii, the bar is of the same cross sectional thickness throughout its 'entire length. irrespective of the degr'ee ot inclination ot thcl depressions 3.

The construction above described. will pertec-thv equalize all shearing .stress or direct stress throughout the entire. length of the har t'or the reason that although .strengthened b v the corrugations which are arranged on each surface on each ot' the sides thereof in a relative and staggered relation, the bar itself is of equal thickness throughout so that no portion of the structure will he of greater size or of greater tensile strength than the other portion.

For the purpose of enabling the bar to take a firm grip in the Structure to be rein :.torced. as well as to compensate 'for any inequalit \v inthe edge thereof due to the depressions '3, I have formed the .eide edges of the bar with corrugations 7 having preferablv curved surfaces of a slight degree ofl pitch.

It' 1s obvious that various minor changes maiv be madel without departing from the vspirit; of my invention as defined in the ap- The prising :1 substni'itially reet-angular bar having v:i central web of uniformthickness and provided on two opposite faces along its marginal edges with V-shzlped depressions 11:1 ving lside walls lending to :1 meeting poincvontignous to the web, the depsessions along one marginal edge being staggered with respect to the depressions along the other und parallel marginal edge on the sume face of the bnr, und ille depressions along thc-mau'- giiml edges on one face of the bnr heilig staggered with respect to the depressions along the corresponding marginal edges on the opposite face of the bar, t-helsize of said depressions being greatest at the edges of the l5 bnr and uniformly diminishing toward and' merging with the said central web.

In testimony whereof I aiiix my signature in the presence of two Witnesses.

WILLIAM G. HUGHES.

Witnesses:

E. E. POTTER, M. E. WHITE. 

